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Journal of systems Science and systems engineering 2008年第3期17卷 257-276页

作者： Mubarak S.AL-MUTAIRI Keith W.HIPEL Mohamed S.KAMEL Department of Computer Science and Engineering Hafr Albatin Community CollegeKing Fahd University of Petroleum & MineralsHafr AlbatinSaudi Arabia Department of Systems Design Engineering University of WaterlooWaterlooOntarioCanada Department of Electrical and Computer Engineering University of WaterlooWaterlooOntarioCanada

A systematic fuzzy approach is developed to model fuzziness and uncertainties in the preferences of decision makers involved in a conflict. This unique fuzzy preference formulation is used within the paradigm of the Graph Model for Conflict Resolution in which a given dispute is modeled in terms of decision makers, each decision maker＇s courses of actions or options, and each decision maker＇s preferences concerning the states or outcomes which could take place. In order to be able to determine the stability of each state for each decision maker and the possible equilibria or resolutions, a range of solution concepts describing potential human behavior under conflict are defined for use with fuzzy preferences. More specifically, strong and weak definitions of stability are provided for the solution concepts called Nash, general metarational, symmetric metarational, and sequential stability. To illustrate how these solution concepts can be conveniently used in practice, they are applied to a dispute over the contamination of an aquifer by a chemical company located in Elmira, Ontario, Canada.

关键词： Environmental conflict fuzzy sets Graph Model for Conflict Resolution preferences multiple participants

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Robust Hough-based symbol recognition using knowledge-based hierarchical neural networks

Robust Hough-based symbol recognition using knowledge-based ...

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2008 International Conference on Image Processing, computer Vision, and Pattern Recognition, IPCV 2008

作者： Wong, Alexander Bishop, William Systems Design Engineering University of Waterloo Waterloo ON Canada Electrical and Computer Engineering University of Waterloo Waterloo ON Canada

ISBN: (纸本)1601320787

A robust method for symbol recognition is presented that utilizes a compact signature based on a modified Hough Transform (HT) and knowledge-based hierarchical neural network structure. Relative position and orientation information is extracted from a symbol image using a modified Hough Transform (HT). This information is transformed and compressed into a compact, 1-D signature vector that is invariant to geometric transformations such as translation, rotation, scaling, and reflection. The proposed method uses a knowledge-based hierarchical neural network structure to reduce the complexity of the recognition process by effectively segmenting the search space into smaller and more manageable clusters based on a priori knowledge. The method achieved overall recognition rates of 96.7% on line graphic symbols from the GREC'05 symbol database under various models of image degradation and distortion.

关键词： Hough transforms

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Efficient and robust approach to simultaneous non-rigid registration and gamma estimation in the frequency domain

Efficient and robust approach to simultaneous non-rigid regi...

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2008 International Conference on Image Processing, computer Vision, and Pattern Recognition, IPCV 2008

作者： Wong, Alexander Bishop, William Systems Design Engineering University of Waterloo Waterloo ON Canada Electrical and Computer Engineering University of Waterloo Waterloo ON Canada

ISBN: (纸本)1601320787

This paper presents an efficient and robust method for performing non-rigid image registration and relative gamma estimation in a simultaneous manner. The proposed method identifies regions of interest within the target image and determines the optimal correspondence and relative gamma between each region of interest and the reference image. The problem of finding the optimal correspondence and relative gamma between each region of interest and the reference image is combined and formulated such that both problems can be solved as a single minimum squared distance problem efficiently using the Fast Fourier Transform (FFT). The resulting correspondence and relative gamma information is used to estimate the geometric transformation between the target image and the reference image, as well as perform gamma correction between the images. Experimental results demonstrate that good registration and relative gamma estimation accuracy can be achieved using the proposed method, making it well-suited for registering images captured under different levels of exposure.

关键词： Fast Fourier transforms

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A Sliding mode control applied to whirling pendulum

A Sliding mode control applied to whirling pendulum

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2nd International Conference on Signals, Circuits and systems

作者： Mahjoub, Sonia Mnif, Faical Derbel, Nabil Research unit on Intelligent Control design Optimization of complex Systems (ICOS) Department of Electrical and Computer Engineering Sultan Qaboos University Muscat Oman

ISBN: (纸本)9781424426270

In this paper, we present a VSS-based tracking control for a fixed point regulation of 2-DOF underactuated manipilators The design approach is systematic and relies on the selection of appropriate choice of two sliding surface. The controller is designed for the both sliding surfaces are attractive. Lyapunov theory is used to study and demonstrate the stability of the system. Convergence of state space is proved and robustness issues to bounded disturbances are also investigated. Simulation results on 2-DOF whirling pendulum are presented to chow the effectiveness of this approach.

关键词： VSS sliding mode underactuated manipulator whirling pendulum

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Editorial introduction for the special issue on sensors for microfluidic analysis systems

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IEEE Sensors Journal 2008年第5期8卷 427-429页

作者： Nagle, H. Troy Fair, Richard B. Shannon, Mark A. Tan, Ooi Kiang Geschke, Oliver Ahn, Chong H. Kaynak, Okyay Vellekoop, Michael J. Duke University Department of Electrical and Computer Engineering Durham NC 27708 United States University of Illinois at Urbana-Champaign Department of Mechanical Engineering Urbana IL 61801-2906 United States Nanyang Technological University Division of Microelectronics School of Electrical and Electronic Engineering Singapore 639798 Singapore Technical University of Denmark Department of Micro- and Nanotechnology Kongens Lyngby DK-2800 Denmark University of Cincinnati Department of Electrical and Computer Engineering and Computer Science Cincinnati OH 45221-0030 United States Bogazici University Department of Electrical and Electronics Engineering Istanbul 34342 Turkey Vienna University of Technology Institute of Sensor and Actuator Systems Vienna A-1040 Austria Department of Electrical and Computer Engineering Duke University Electrochemical Society Department of Mechanical Engineering University of Illinois at Urbana-Champaign Urbana IL United States National Science Foundation Science and Technology Center WaterCAMPWS Micro-Nano-Mechanical Systems Laboratory Nanyang Technological University School of Electrical and Electronic Engineering Department of Electrical and Computer Engineering and Computer Science University of Cincinnati Cincinnati OH United States Departments of Electrical Engineering and Biomedical Engineering Microsystems and BioMEMS Laboratory Univensity of Cincinnati Departments of Electrical and Electronics Engineering Bogazici University Istanbul Turkey UNESCO Mechatronics Research and Annlication Centre Vienna Austria Department of Industrial Sensor Systems Institute of Sensor and Actuator Systems Vienna University of Technology Vienna Austria

No abstract available

关键词： Special issues and sections Sensor systems Microfluidics Microelectronics USA Councils Mechanical engineering Actuators Fabrication Biosensors Ferroelectric materials

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Introduction to the special section on advances in test automation: The evolution of TTCN-3

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International Journal on Software Tools for Technology Transfer 2008年第4期10卷 281-283页

作者： Schieferdecker, Ina Grabowski, Jens Design and Testing of Communication-Based Systems Faculty IV - Electrical Engineering and Computer Science Technical University Berlin Franklinstr. 28-29 Berlin 10587 Germany Software Engineering for Distributed Systems Group Institute of Computer Science University of Göttingen Lotzestrasse 16-18 Göttingen 37083 Germany

No abstract available

关键词： TESTING -- Equipment & supplies TECHNOLOGICAL innovations COMMAND & control systems TELECOMMUNICATION systems

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Control design for efficient and cost-effective distributed fuel cell power electronics system

Control design for efficient and cost-effective distributed ...

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34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008

作者： Mazumder, Sudip K. Pradhan, Sanjaya K. Laboratory for Energy and Switching-Electronics Systems Department of Electrical and Computer Engineering University of Illinois Chicago United States Product Design Engineer Philips United States

ISBN: (纸本)9781424417667

Batteries in a fuel cell power system are essential to provide the additional load demands during the sharp load transients. This necessitates a power electronics system, which would control the energy flow between the fuel cell stack, the battery and the load during the transient and in the steady-state. In this paper, a cost-effective and efficient power electronic system is proposed for a fuel cell based hybrid power system based on a distributed power electronics topology. The system includes a hierarchical controlling architecture, in which the master control optimizes the control parameters of the individual subsystem controls, which in turn optimizes the performance and efficiency of the overall system while nullifying the effects of load transients on the fuel cell stack subsystem. The power electronics system concept is further experimentally validated using a four module bidirectional dc-dc converter with Nexa PEM stack. © 2008 IEEE.

关键词： Cost effectiveness

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Model order selection for multiple cooperative swarms clustering using stability analysis

Model order selection for multiple cooperative swarms cluste...

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Congress on Evolutionary Computation

作者： Abbas Ahmadi Fakhri Karray Mohamed Kamel Department of Systems Design Engineering University of Waterloo Canada Department of Electrical and Computer Engineering University of Waterloo Canada

Extracting different clusters of the given data is an appealing topic in swarm intelligence applications. This paper introduces multiple cooperative swarms and single swarm clustering approaches and provides mathematical descriptions explaining why the former approach outperform the other one. Moreover, the stability analysis is proposed to obtain the model order of the data using multiple cooperative swarms clustering approach. The proposed clustering approach is evaluated using three data sets and its performance is compared with that of other clustering techniques.

关键词： Clustering algorithms Stability analysis Distance measurement Classification algorithms Algorithm design and analysis Particle swarm optimization Data models

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Deblocking of Block-Transform Compressed Images Using Phase-Adaptive Shifted Thresholding

Deblocking of Block-Transform Compressed Images Using Phase-...

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IEEE International Symposium on Multimedia

作者： Alexander Wong William Bishop Systems Design Engineering University of Waterloo Waterloo ONT Canada Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada

Many popular image compression schemes are based on block-transform coding, a technique where images are broken into small blocks of pixels prior to transformation and compression. Block-transform coding often introduces blocking artifacts which are particularly prevalent at low bit-rates due to quantization errors. A novel algorithm for deblocking block-transform compressed images is proposed in this paper. This algorithm is based on a phase-adaptive, shifted thresholding technique that estimates the original uncompressed image as the weighted sum of shifted versions of the decompressed image subjected to a threshold. An efficient integer transform is used to construct the shifted versions of the decompressed image. The aggregation weights are obtained adaptively using the local phase moment characteristics of the underlying image content. The proposed algorithm utilizes important human perceptual characteristics to provide effective image deblocking while preserving image detail. Experimental results show that the proposed algorithm is more efficient than comparable methods and yields both subjective results and peak signal-to-noise ratio (PSNR) results comparable to existing methods.

关键词： Image coding Compression algorithms Image storage Quantization Transform coding Pixel PSNR Video compression Image quality Filtering

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Robust Edge Detection Based on Non-local Contribution of Local Frequency Characteristics

Robust Edge Detection Based on Non-local Contribution of Loc...

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IEEE International Symposium on Multimedia

作者： Alexander Wong William Bishop Systems Design Engineering University of Waterloo Waterloo ONT Canada Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada

This paper introduces a robust approach to the problem of edge detection in situations characterized by high levels of image degradation and illumination non-uniformity. Popular edge detection methods are dependent solely on local image characteristics to localize edge information. In the proposed algorithm, we demonstrate that superior edge detection performance can be achieved by utilizing nonlocal image characteristics. This is accomplished by estimating the edge strength of a given pixel based on the local frequency characteristics of every pixel within an image. The proposed method is highly robust to scenarios characterized by illumination non-uniformity and low signal-to-noise ratios. Experimental results show that using the proposed method, edge detection can be qualitatively improved over existing methods on a small set of test images.

关键词： Robustness Image edge detection Lighting Frequency estimation Degradation Pixel Detectors computer vision Image analysis Multimedia systems

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